POWER NETWORK PARAMETER ANALYSER N10

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1 POWER NETWORK PARAMETER ANALYSER N10 SERVICE MANUAL

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3 POWER NETWORK PARAMETER ANALYSER N10 Service manual 1. APPLICATION METER SET INSTALLATION FITTING EXTERNAL CONNECTION DIAGRAMS PROGRAMMING FACEPLATE DESCRIPTION N10 OPERATING MODES MEASURING MODE Measurement of voltage and current harmonics TIME SETTING MODE - t PARAMETER CONFIGURATION MODE - S ALARM CONFIGURATION MODE - A PAGE CONFIGURATION MODE - P ERROR CODES TECHNICAL DATA ORDERING CODES MAINTENANCE AND GUARANTEE

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5 1. APPLICATION The N10 type meter is a programmable digital instrument destined to measure parameters in three-phase, 3 or 4-wire power networks, in symmetric and asymmetric systems with the simultaneous display of measured quantities and the digital transmission of their values and their conversion into an analog standard signal. This meter enables the control and optimization of power electronic devices, systems and industrial installations. It ensures the measurement of: RMS voltage and current, active power and energy, reactive power and energy, power factors, frequency, 15-minutes active mean powers. Voltages and currents are multiplied by given voltage and current ratios of voltage and current measuring transformers. Power and energy indications take into consideration values of programmed ratios. This meter indicates additionally the actual time. The value of each measured quantity can be transmitted to the superordinated system through the RS-485 interface. One of the chosen quantity can be additionally transmitted by means of a standard current signal, three relays outputs can be used to signalize exceedings of chosen quantities, a pulse output to control energy counters with pulse inputs, and a pulse input to check counters having pulse outputs. Measurements are carried out by the sampling method of voltage and current signals. The meter is adapted to be fixed into a pannel by means of holders. 2. METER SET The set includes: - N10 type meter 1 pc. - service manual 1 pc. - guarantee card 1 pc. - holders to fix into a pannel 4 pcs. Additionally for the execution with interface: - service manual of the serial interface 1 pc. - service manual of the WIZPAR program 1 pc - lead of the RS-485 interface 1 pc. - matching resistor 1 pc. - diskette for the WIZPAR program 1 pc. 5

6 3. INSTALLATION 3.1. Fitting way The meter is adapted to be mounted by means of holders accor ding fig.1. The meter housing is made of a sell-extinguishing plastics. Housing dimensions are 144 x 144 x 77mm. At the outside of the meter there are screwed terminal strips which enable the connection up to 2.5 mm 2 external leads. Fig.1. Overall dimensions and fitting way of the N10 meter. 6

7 3.2. External connection diagrams Direct measurement in a 3-phase network Half-intermediate measurement in a 3-phase network 7

8 Intermediate measurement using 2-current transformers and 2 or 3 voltage transformers in a 3-phase network Fig. 2. Meter connection diagrams in a three-phase network 8

9 Direct measurement in a 4-phase network Half-intermediate measurement in a 4-wire network 9

10 Intermediate measurement using 2-current transformers and 2 or 3 voltage transformers in a 3-phase network Fig. 3. Meter connection diagrams in a four-wire network 10

11 NOTICE: To make the IBM PC - N10 meter (RS-485) connection it is recommended to use a double-wire twisted conductor in a screen. The screen should be connected to the earth in one point. The screening is necessary when the environment is very perturbed. Fig. 4. Connecting way of N10 meters with an RS-485 interface. 11

12 4. PROGRAMMING 4.1. Faceplate description Fig. 5. View of the N10 meter faceplate The N10 meter has 6 keys, four 5-digits display sections and illuminated symbols and parameter units. Values of measured parameters are shown on active pages selected by successive pressures of the key. A page consists of 4 optional quantities chosen from the table 5 and displayed simultaneously on the meter. The page definition is described in the configuration mode P. 12

13 Table ENTER acceptance key Right displacement key Value increase key Value decrease key Left displacement key ESC resignation key The assignment of individual keys is as follows: Key It is destined to accept the introduced value during the programmation. It enables the change of pages in the measuring mode. Keys They are destined to change the digit value on the decimal position during the programmation. They enable the display of suitably minimal and maximal values. Keys They allow the cursor displacement to successive decimal positions during the programmation and enable the change of display luminosity. Key This key enables in anytime the resignation of carried out operations. It cancels alarms in measuring mode. 13

14 4.2. N10 operating modes The N10 meter has 5 operating modes represented on the table 2. NAME MODE CALLING OUT SYMBOL INPUT OUTPUT Measuring Understood Through input to another mode Time setting Page configuration Parameter configuration Alarm configuration t P S A in SETUP procedure in SETUP procedure in SETUP procedure in SETUP procedure After its switching on, the meter makes tests informing by the announcement: Table 2 or after the last parameter or after the last parameter or after the last parameter or after the last parameter where: h No of the actual program version, After tests carrying out, the meter enters into the measuring mode and displays the page positioned before switching off. The entry into another mode is made in the SETUP procedure. In order to enter in the SETUP procedure one should press two keys: during ca 3 seconds, until the audible signal will be switched off. 14

15 Choose by means of keys the appropriate mode. The active mode t, P, S or A is signalled by the flashing of the suitable symbol. Accept the chosen mode by the key. The return from other modes into the measuring mode is carried out by means of the or key: - after the last parameter (in t, S and A modes), - after the last page (in the P mode) Measuring mode Values of different quantities are displayed acc. programmed pages by the manufacturer or configurated by the user in the P mode. The change of page is realized by pressing the Key. The sequence of displayed pages is proceeded acc. the table formed in the P mode. The monitoring of maximal or minimal values is realized when pressing respectively the or key. The cancellation of maximal or minimal values is realized when pressing the key during the monitoring of these values, i.e. at first the or key must be pressed and after the key. Alarms are active if they were allocated. One must notice that alarm do not need to be related to quantities displayed on the page, because a change of page would cause an action on two-state outputs. 15

16 Measurement of voltages and current harmonics The selection of harmonics is made by pressing keys for reviewing current harmonic, or by keys for reviewing voltage harmonics. The selected U1,U2,U3 or I1,I2, I3 quantity is signalled by the flashing of the suitable digit. One must choose by the or key the required quantity and press the key. The following quantities will be displayed: Where: w-n - chosen quantity, e.g. U-1 n-n - harmonic number xxx.x - value of the n-th harmonic The harmonic number up to the 25th harmonic can be changed by means of or keys. The active position is signalled by the cursor. One can return to display the selection of reviewed harmonics by pressing the key. A successive pressure of the key means the return to the measuring mode. For wrong THD indications, successive harmonic values will not be displayed. 16

17 NOTICE: Indications appear when the parameter 22 will be switch on in the SETUP mode, i.e. the selection of the harmonic measurement and the assumptions concerning the measurement will be fulfilled Setting time mode - t After the entry into the SETUP procedure one must choose the mode t by pressing the or key and the key. Following values will be displayed: Where: yyyy - year mm - month dd - day By means of keys required values can be set, i.e. the position of the decimal digit can be choosen by the or key, the digit value by the or key. The cursor signalizes the active position. The set value can be accepted by the key or cancelled by the key and comes back into the measuring mode. causes the arrangement on the successive parameter. after dd (day), causes the transition to hours and minutes settings. Where: hh - hours mm - minutes ss - secondes 17

18 The setting of hours and minutes is similar to the setting of the year, month and day. after min (minutes), causes the memorization of set values and the exit from the mode t. The seconde counter is not be set but it is zeroed when accepting minutes. This means that in order to obtain an accurate timer setting one must wait till a full minute and then press the key (ENTER) Parameter configuration mode - S This mode is destined to set meter parameters, input and output signal values. The entry into the parameter configuration mode is protected by the access code if an access code different from zero had been introduced. In the case of 0000 code, password inquiry is omitted. If the access code is different from zero, there is the possibility of parameter reviewing, but changes are locked. Values are set in this mode acc. the table 3. Table 3 Item Parameter name 1 Introduction of access code 2 Setting of meter parameters by the manufacturer 3 Ratio of current transformer 4 Ratio of voltage transformer 5 Quantity on the continuous output 6 Factor of output rescaling 7 Range of the continuous output Designa tion Range Notice/description Manufacturer s values SECU without code 0000 rest Y/n n tr_i tr_u Ao_n Quantity code acc. table 5 Ao_L % Ao_0 0, mA mA

19 8 Quantity on the pulse output 9 Constans of the pulse output 10 Quantity on the pulse input Constant of the external energy counter 11 (pulse input) Cancellation of the external energy counter 12 (counter of the pulse input) 13 Cancellation of the active energy counter 14 Cancellation of the reactive energy counter Cancellation of the apparent energy 15 counter Cancellation of the minutes active power PAV (max. and min. Value) 17 Averaging time of PAV power Synchronization of the 18 PAV power averaging to the real timer 19 Meter address in the system 20 Rate of the serial interface 21 Interface working modetr Selection of the harmonic measurement Change of the access code Table 3 Po_n 0, Quantity code acc. table 5 35 Pulse number/ Po_c kWh,kVar,kVAhmax pulses/sec. PI_n 0, Quantity code acc. table 5 38 PI_c Pulse number/ 1kWh,kVarh,kVAh 0 -switched off interface 1 -MODBUS ASCII 8N1 2 -MODBUS ASCII 7E1 3 -MODBUS ASCII 7O1 4 -MODBUS RTU 8N2 5 -MODBUS RTU 8E1 6 -MODBUS RTU 8O PI_0 Y/n n EnP0 Y/n n Enq0 Y/n n EnS0 Y/n n PA_0 PA_t 15, 30, 60 min. Y/n PA_S Y/n n Adr baud 300,600,.., tryb 0, 1,...,6 n Har In parameters 5, 8, 10, 21 the range 0 means that the appropriate output, input is switched off. 19

20 Notations: N - lack of parity (no parity), E - bit checking the even parity, O - bit checking the odd parity. The entry into the procedure causes the setting on the parameter 1 or 2 if the access code is equal We adjust required values by means of keys, i.e. one can choose the position of the decimal digit by pressing the or key, the digit value by pressing the or key. The active position is signalled by the cursor. One can accept the established value by pressing the key or cancel it by pressing the key and come back to the measuring mode. causes the setting on the successive parameter. after the last parameter, causes the memorization of setting values and the exit from the mode S. Notice: PA_S=Y means that the average power P AV will be brought up to date every 15, 30, or 60 minutes synchronized with the internal virtual timer. PA_S=n means that the average power will be calculated for the last 15, 30, or 60 minutes and brought up to date every 1 seconde, so-called moving window Alarm configuration mode - A This mode serves to: - attribute the quantity to alarms, - Set the thresholds setting of alarm switching on and off (also the direction of alarm action). 20

21 Item Parameter name 1 Two state output 1- quantity 2 Two state output 1- switch on value 3 Two state output 1- switch off value 4 Two state output 2- quantity 5 Two state output 2- switch on value 6 Two state output 2- switch off value 7 Two state output 3- quantity 8 Two state output 3- switch on value 9 Two state output 3- switch off value 10 Delay of alarm action Designa tion A1_n A1on A1oF A2_n A2on A2oF A3_n A3on A3oF ALdt Range 0, [%] [%] 0, [%] [%] Notice/description Quantity code acc. table 5 Quantity code acc. table 5 0, Quantity code acc. table 5 Table 4 Manufacturer s values [%] [%] sec Time lag of alarm switching on 99 0 The entry into the mode of alarm setting is not protected by the access code. Alarms are active if they were attributed, i.e. if a measured quantity different than zero (table 5) has been attributed to them. One must notice that alarms concern chosen quantities in the basic configuration mode S and they are not related with quantities displayed on the page. If the quantity value related to the alarm exceeds the declared threshold, the two-state output corresponding to this alarm will be switched on (relay) and the symbol Ai will be lighted. If the quantity value decreases below the alarm threshold, the two-state output is switched off, but the Ai signalling remains until the time of its cancellation by means of the ESC key. The Aion < AioF setting causes the alarm inverse action, i.e. the output is switched on if the prescribed value decreases below the Aion value and the output is switched off if the value increases above the AioF threshold. 21

22 Page configuration mode - P This mode is used to select quantities displayed simultaneously on the meter, i.e. to define user s pages. A list of possible quantities and their codes are inserted in the table 5. Code Quantity name Symbol Unit 00 Without quantity - display extinguished 01 Phase 1 voltage U 1 (k)v L1 02 Line L1 current I 1 (k)a L1 Table Phase L1 active power P 1 (M,k)W L1 /- 04 Phase L1 reactive power Q 1 (M,k)VAr L1 /- 05 Phase L1 apparent power S 1 (M,k)VA L1 06 Phase L1 active power factor (Pf 1 = P 1 / S 1 ) Pf 1 Pf L1 /- 07 Phase L1 t 1 factor (t 1 = Q 1 / P 1 ) t 1 t L1 /- 08 Phase L2 voltage U 2 (k)v L2 09 Line L2 current I 2 (k)a L2 10 Phase L2 active power P 2 (M,k)W L2 /- 11 Phase L2 reactive power Q 2 (M,k)VAr L2 /- 12 Phase L2 apparent power S 2 (M,k)VA L2 13 Phase L2 active power factor (Pf 2 = P 2 / S 2 ) Pf 2 Pf L2 /- 14 Phase L2 t 2 factor (t 2 = Q 2 / P 2 ) t 2 t L2 /- 15 Phase 3 voltage U 3 (k)v L3 16 Line L3 current I 3 (k)a L3 17 Phase L3 active power P 3 (M,k)W L3 /- 18 Phase L3 reactive power Q 3 (M,k)VAr L3 /- 19 Phase L3 apparent power S 3 (M,k)VA L3 Signalling 20 Phase L3 active power factor (Pf 3 = P 3 / S 3 ) Pf 3 Pf L3 /- 21 Phase L3 t 3 factor (t 3 = Q 3 / P 3 ) t 3 t L3 /- 22 Average 3-phase voltage Us (k)v 1,2,3 23 Average 3-phase current Is (k)a L1,L2,L3 Mark 22

23 24 3-phase active power P (M,k)W L1,L2,L3 / phase reactive power Q (M,k)VAr L1,L2,L3 / phase apparent power S (M,k)VA L1,L2,L3 27 Active power factor (Pf= P/ S) Pf Pf L1,L2,L3 /- 28 Average 3-phase t( factor (t = Q/P) t t L1,L2,L3 /- 29 Frequency f Hz 30 Voltage between lines L1-L2 U12 (k)v L1,L2 31 Voltage between lines L2-L3 U23 (k)v L2,L3 32 Voltage between lines L3-L1 U31 (k)v L3,L1 33 Average between lines voiltage U123 (k)v L1,L2,L minutes average active power PAV (M,k)W 1, 2, phase active energy EnP (M,k)Wh L1,L2,L3 / phase reactive energy Enb (M,k)VArh L1,L2,L3 / phase apparent energy EnS (M,k)VAh L1,L2,L3 38 Active energy from external counter EnPz (M,k)Wh 39 Reactive energy from external counter Enbz (M,k)VArh 40 Apparent energy from external counter EnSz (M,k)VA 41 Date - day, month 42 Date - year 43 Time - hours, minutes 44 Time - secondes 45 THD of the phase L1 voltage THD U1 V% L1 46 THD of the phase L2 voltage THD U2 V% L2 47 THD of the phase L3 voltage THD U3 V% L3 48 THD of the phase L1 current THD I1 A% L1 49 THD of the phase L2 current THD I2 A% L2 50 THD of the phase L3 current THD I3 A% L3 In the case of parameters , the denominations V and A have got a conventional character distinguishing the given parameter, the basic quantity in %. 23

24 In order to define pages one must enter into the mode P. By pressing keys set the number nn of user s pages from the range Accept by the key the chosen mode. If the number of pages is set 00, it means that the user did not decide to define own pages and chose 7 pages programmed by the manufacturer. Manufacturer s settings are shown below: Page 1 Page 2 Page 3 Page 4 01 U1(k)V 08 U2(k)V 15 U3(k)V 22 Us(k)V 24 P (Mk) W 25 Q (Mk) VAr 26 S (Mk) VA 27 Pf 30 U12(k)V 31 U23(k)V 32 U31(k)V 33 U123(k)V 02 I1(k)A 09 I2(k)A 16 I3(k)A 23 Is (k)a 03 P1 (Mk)W 10 P2 (Mk)W 17 P3 (Mk)W 24 P (Mk)W Page 5 Page 6 Page 7 35 EnP (Mk) Wh 36 EnB (Mk) VArh 37 EnS (Mk) VAh 38 f 41 dd.mm 42 yyyy 43 hh.mm 44 ss If a non-zero number of pages has been set then one must define the page contents. nn - page number kk - quantity code acc. to the table 5. 24

25 By pressing keys, set required quantities on successive display sections. The active position is signaled by the cursor. One can accept the established value by the key or cancel it by pressing the key. causes the setting on the next parameter or the successive page. after the last page, causes the memorization of pages and the exit from the configuration mode P. 5. ERROR CODES During the meter operation, communicates concerning errors can occur. Causes of errors are presented below: Err1 - when the voltage or the current is too low during the measurement: Pf i,t i below 7% U n and (or) below 2% I n f below 0,5% THD U i, THD I i, below 1% U n,i n - or the full interval of the PA_t averaging time is not elapsed yet, Err2 - Lack of possibility to define the maximal or minimal quantity value (lack of current, usually after the meter switching on or the cancellation of extremal values) Lo F - frequency lower than 47 Hz for THD U i, THD I i measurements, Hi F - frequency higher than 52 Hz for THD U i, THD I i measurements. 25

26 26 Fig.6 N10 meter working modes.

27 6. TECHNICAL DATA Measuring ranges and admissible basic errors are shown on the table 6 Table 6 Measured quantity Range Basic error U i voltage I i current V (Ku=1) V (Ku=1) for Ku kv A (Ki=1) A (Ki=1) for Ki ka (0.2% m.v. +0.1% range) (0.2% m.v. +0.1% range) remarks Ku = Ki = P i active power P AV mean active power Active energy EnP, EnPz S i apparent power. Apparent energy EnS, EnSz Q i reactive power. Reactive energy EnQz Pf i active power factor tg i factor (ratio of reactive power to active power) f frequency THD U, THD I harmonics (-) W (Wh) for Ku 1, Ki 1...(-) MW (MWh) VA (VAh) for Ku 1, Ki MVA (MVAh) (-) Var (Varh) for Ku 1, Ki 1 (-) MVar (MVarh) (0.5% m.v. +0.2% range) (0.5% m.v. +0.2% range) (0.5% m.v. +0.2% range) % m.v. 2c % m.v. 2c Hz 0.5% m.v % 0.5% m.v. 2c Pf=Power factor=p/s Error in the range: Error in the range: % U, I Hz Where: Ku - voltage transformer ratio Ki - current transformer ratio m.v. - measured value c - less significant display digit THD U - full distorsion factor (by voltage harmonics) THD I - full distorsion factor (by current harmonics) 27

28 Power consumption: - supply circuit 12 VA - voltage circuit 0.5 VA - current circuit 0.1 VA Supply voltage Display section Analog output Relay output Passive pulse output Passive pulse input Measurement of the harmonics (Up to the 25 th) THD - Total Harmonic Distortion Serial interface Transmission protocol Meter reaction to decays and supply recovery: RS-485 MODBUS Degree of protection ensured by the case acc. IEC529: - frontal side IP 40 - rear side IP 10 Weight Overall dimensions data and meter state preservation during supply decays, (battery support), work continuation after supply recovery 0.8 kg mm Panel cut-out dimensions V d.c. or a.c., Hz 4 x 5 LED digits, 14 mm high red or green digits ma, ( ma) selected from the keyboard, accuracy 0.5% 3 relays, voltageless make contacts, Load capacity 250 V a.c./ 0.5 A~ Hz V d.c. ( ma) 0/24 V d.c. 50%, for currents and voltages for currents and voltages 28

29 Reference conditions and nominal operation conditions: - Input signal: In; Un, for voltage, current, frequency, power and energy In; Un, for Pf and t factors, frequency Hz sinusoidal input signal THD 8% In; Un; Hz, for THDU, THDI and harmonics - power factor ambient temperature C - air humidity % (no condensation) - power supply V d.c. or a.c Hz - admissible peak factor: - current 2 - voltage 2 - external magnetic field A/m - short duration overload (5 sec): - voltage inputs 2 Un (max.1000 V) - current inputs 10 In - working position optional - warm-up time 5 minutes Additional errors in % of the basic error: - input signal frequency < 50% - ambient temperature changes < 50%/10 C Resistance against supply decays acc. to EN Standards fulfilled by the meter: Electromagnetic compatibility: - immunity acc. EN emission acc. EN Safety requirements: acc. EN insulation ensured by the housing dual - insulation between circuits basic - installation category III - pollution degree 2 - maximal working voltage in relation to ground 600 V a.c. 29

30 7. ORDERING CODES Execution codes for the N10 network parameter meter Table 7 NETWORK PARAMETER METER N10 X X X X X XX X Input current I n: 1 A (X/1) 1 5 A (X/5) 2 acc. order * 9 Input phase voltage U n: 100 V V 2 acc. order * 9 Digital output: without interface 0 with RS 485 interface 1 Display: red digits 1 green digits 2 Power supply: V d.c. or a.c Hz 0 acc. order* 9 Kind of execution: standard 00 custom-made 99 Acceptance tests: without additional requirements 8 with a quality inspection certifi cate 7 acc. customer s agreements ** X * after agreement with the manufacturer ** the execution numbering will be made by manufacturer 30

31 ORDERING EXAMPLE: code N means: input range: 5 A, 100 V, RS-485 interface, green displays, power supply: V d.c./a.c., standard execution, with a quality inspection certificate. 8. MAINTENANCE AND GUARANTEE The N10 meter does not require any periodical maintenance. In case of some incorrect unit operations: 1. In the period of 12 months from the date of purchase: One should take the meter down from the installation and return it to the LUMEL s Quality Control Dept. If the unit has been used in compliance with the instructions, LUMEL S.A. guarantees to repair it free of charge. 2. After the warranty period: One should turn over the meter to repair in a certified service workshop. The disassembling of the housing causes the cancellation of the granted guarantee. Spare parts are available for the period of ten years from the date of purchase. LUMEL S.A. reserves the right to make changes in design and specifications of any products as engineering advances or necessity requires. 31

32 N10-07A/1

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